Equipment for producing special pipes

Details Equipment for producing special pipes Equipment for producing special pipes

1978-05-08

1980-03-04

Rosenbaum, Mark

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

425467, B29D 2304

Patent

active

041915186

ABSTRACT:
Equipment for producing a pipe having a longitudinally extending diaphragm which partitions the interior of the pipe into two conduits. This equipment comprsises a die head with a circular slit to extrude the tubular body of the pipe and a flat slit to extrude the partitioning diaphragm. Means are provided to deform that diaphragm at spaced apart intervals along its length so as to intimately contact one of the pipe walls at those intervals. This means may be a nozzle having an opening for expelling a fluid against the diaphragm while it is still in a plastic state or a movable plate similarly positioned.

REFERENCES:
patent: 3708253 (1973-01-01), Lemelson
patent: 3929951 (1975-12-01), Shibata et al.
patent: 3994646 (1976-11-01), Hauck

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